Pateick fitzgibbons



(No Model.)

P. FITZGIBBONS.

STEAM BOILBR.

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Unire@ STATESl arent 'Ottica PATRICK FITZGIBBONS, OF OSWEGO, NEV YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 290,762," datedDecember-25, 1883,

Application filed October 9, 1R83.

To all whom it may concern,.-

Be it known that I, PATRICK FITZGIBBoNs, of Oswego, in the county ofOswego, in the State of New York, have invented new and usefulImprovements in Steam-Boilers, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

The object of this invention is to construct in the simplest, safest,and most effective form a steam-boiler with a water-jacketedcombustion-chamber having a man-hole to afford ready access to theinterior thereof for repairing, removing, or cleaning the same; and theinvention consists, essentially, in a return-iiue boiler having a rearend extension, with a man-hole in the bottom thereof, a water-jacketedcombustion-chamber constructed of the rear flue-sheet and innerwater-back sheet, having their edges turned or iianged toward thecombustion-chamber, and their bott-om ange riveted directly to theboiler-shell extension at opposite edges of the manhole, and thecrown-sheet extended to and terminating at the said man-hole, andriveted to the flanges of the aforesaid flue-sheet and waterback sheet,and directly to the bottom portion of the boiler-shell extension, saidconstruction and combination of parts not only producing but a singlecalking-seam around the edges of the manhole, but also dispensing withthe usual frame heretofore interposed between the edges of the sheets tobe joined around the man-hole, all as hereinafter more fully described,and specifically set forth in the claim.

In the annexed drawings, Figure I is a longitudinal section of asteam-boiler embodying my improvements; and Figs. II, III, and IV arevertical transverse sections, respectively, on lines x x, y y, and z z,Fig. I.

Similar letters of reference indicate corresponding parts.

A denotes the main boiler-shell, of cylindrical form, and Bis thefireboX,'built under the front end of the boiler, with a water-spacearound its sides and ends, in the usual manner. The rear end of thefire-box I construct with an elevated centrally-arched portion, C, whichprojects into the boiler-shell, and the center of the arched portion istapped by the main fire-fine D, which is extended to oppo- (No model.)

site ends ofthe boiler, and communicates with the rearcombustion-chamber, E, and front smoke-box, F, at which latter place theend of said main iiue is provided with a damper, 40L, as shown in Fig. Iof the drawings.

b b are the ordinary return-lines, extended from the combustion-chamberdirect to the front smoke-box in the usual manner.

The combustion-chamber E, I form in an eX- tension, N, of the rear endof the boiler-shell beyond the rear nue-sheet, which extension I provideat its bottom with an openin g or manhole, d, and with a removablecover, e, over said man-hole, as indicated by dotted lines in Figs. Iand IV of the drawings. Said combustion-chamber is formed of the rearfluesheet, c, and the inner sheet, f, of the waterback g, which sheetsare of a smaller diameter than the boiler-shell, so as to leave a spacearound the edges of the former. The top edges of said sheets are belowthe water-line of the boiler, so as to protect the crown-sheet h,connected to said edges. All of the edges of the two sheets c and fareturned or iianged toward the combustion-chamber, and are thus easy ofaccess for riveting and calking, and the bottom flanges of said sheetsare riveted directly to the bottom portion of the boilershell extensionat opposite edges of the manhole d. The crown-sheet his extended acrossthe top and down the side edges of the sheets c and f and riveted to theflanges thereof. The

ends of the sheet h terminate at the edges of the man-hole d, and areriveted directly to the bottom portion of the boiler-sheet extension N.Since the tendency of the heat is toward the upper part of thecombustion-chamber, the waterspaces at the sides of thecombustion-chamber admit of a gradual diminution in width toward theman-hole d, where the combustion-chamber is joined directly to theboiler-shell extension, as shown.

I do not claim, broadly, the junction of the sides of thecombustion-chamber directly with the bottom portion of the boiler-shell,as I am aware the same is not new. rPhe feature of novelty in this caselies in the combination, with the boiler-shell extension provided with aman-hole, and the combustion-chamber shell h, joined directly to theboiler-shell, as shown, of the rear flue-sheet and inner water-back IOOy y I 2 agence sheet iian ged toward the combustion-chamber, l andhaving the shell h secured to the exterior of the flanges of theaforesaid sheets, and the bottom portion of said ianges seated directlyupon and riveted to the bottom portion of the boiler-shell at oppositesides of the man-hole, said construction and combination of partsconstituting essential improvements on prior devices in severalrespects, viz: first, it renders the joints between the shell 7L andsheets c and f easily accessible from the interior of the combustionchamber, and thus facilitates the riveting and calking of the same;secondly, it dispenses with the extra frame heretofore employed aroundthe man-hole; and, thirdly, it forms a single and easily-accessibleoalking-seam around the man-hole. The said man-hole allows a person toenter the combustion-chamber from the bottom thereof su'iiiciently topermit said person to set the stays and lues and to readily clean theiiues and combustion-chamber, or make any repairs that may be required.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

In a return-hue boiler having a rear end extension with a man-hole inthe bottom thereof, a water-jacketed combustion-chamber constructed ofthe rear iiue-sheet and inner wa- 3o ter-back sheet, having their edgesanged toward the combustion-chamber, and their bottom iiange riveteddirectly to the boiler-shell extension at opposite edges of theman-hole, and the crown-sheet extended to and termi- 35. nating at thesaid man-hole, and riveted to the exterior of the iianges of theaforesaid iiuesheet and water-back sheet, and directly to the bottomportion of the boiler-shell extension, the whole constructed andcombined 4o substantially as described and shown.

In testimony whereof I have hereunto signed my name and affixed my seal,in the presence of two attesting witnesses, at Syracuse, in the countyof Onondaga, in the State ofNew York, 45 this 2d day of October, 1883.

PATRICK FITZGIBBONS. [L s] W'itnesses:

FREDERICK H. Gines,

W. C. RAYMOND.

